Calculate the angular of (a) `1^(@)` (degree) (b) 1' (minute of arc or arcmin) and (c) 1'' (second of arc or arc second) in radians. Use `360^(@)=2pi` rad, `1^(@)=60'` and `1'=60''`

Explanation

(a) We have `360^(@)= 2pi` rad
`1^(@) (pi//180) "rad" = 1.745xx10^(-2)` rad
(b) `1^(@)=60 = 1.745xx10^(-2)` rad
`1.=2.908xx10^(-4) "rad" = 2.91xx10^(-4)` rad
(c ) `1=60" =2.908xx10^(-4) `rad
`1 =4.847xx10^(-6) "rad " = 4.85xx10^(-6)` rad